Summary
Westbound Adventure is a 1983 Sigma 33 Cruiser designed by David Thomas. Known for being a fast, stable, and capable offshore boat suitable for cruising. The original OOD version has a deep fin keel and fractional rig, while this "detuned" cruising version was also produced from 1981 onwards with a shorter mast and shallower wing tandem keel. She has accommodation for up to seven berths. Despite its age, they have proven its heavy-weather ability, with some boats having circumnavigated the globe.
Westbound benefits from a 2006 Beta engine, electric windlass, and heating. She has also been maintained to RYA and MCA standards during her 20 years as a sail training vessel, with 5-year out of the water inspections and annual in-water RYA inspections.

Construction
The Sigma 33 cruiser is constructed from hand-laid GRP (glass-reinforced plastic) with a foam-cored floor and integral bulkheads. Early versions had off-white hulls, while later models featured white hulls and decks. They are built with a fin keel, spade rudder with tiller steering, and a single-skin GRP hull.
Construction details:

The hull is hand-laid GRP, and the decks are GRP with non-slip surfaces.
Some early boats had off-white hull gel coats with blue or cream decks, while later ones had white hulls and decks.
The construction includes foam-cored floors and integral bulkheads for durability.
The Sigma 33 Cruiser features a tandem wing keel and a tiller-steered spade rudder.
The construction includes integral bulkheads, which contribute to the boat's structural integrity.


Mechanicals
Engine

2006 Beta 20 diesel engine 20Hp
Shaft drive
Feather Stream 3 bladed feathering prop.

Electrics

12 volt system
3 batteries: 2 domestic, 1 engine start
Charged via engine alternator.

Water System

Manual pumped to galley sink and heads hand basin.

Tankage

Diesel tank 40 litres in stainless steel.
Water tank 100 litres in plastic.


Mast Rigging and Sails
Mast and Spars

Cruiser masthead version by Selden
Alloy mast and boom
Spinnaker pole
Standing rigging last replaced 2008
Twin Groove Genoa Furling unit.

Sails

Fully Battened Mainsail by Owen Sails new 2010
Fully Battened Mainsail original.
Furling Genoa by Owen Sails new 2012
Furling Genoa original
Storm Jib
Blade Jib by Owen Sails 2014
Tri-radial Spinnaker

Winches

2x 2 speed self-tailing Genoa winches
2x 2 speed self-tailing Halyard winches
1x 2 speed Reefing winch
2x 1 speed Spinnaker winches


Accommodation
A Sigma 33 cruiser typically offers accommodation for up to 6 people in two cabins, featuring a V-berth in the forepeak, a dinette in the saloon that converts to a double berth, and a single settee berth with a pilot berth above it. There is also a separate heads compartment with a marine toilet and a galley with a cooker, sink, and storage.
Accommodation layout


Forecabin: A V-berth with an infill and storage underneath. There is an opening hatch to the foredeck.

Heads: A separate compartment between the forecabin and saloon, typically on the port side, with a marine toilet and washbasin. A hanging locker is often located opposite.

Saloon: A port-side settee can convert to a double berth. A starboard-side settee can convert to a single berth, sometimes with a pilot or lee cloth berth above it. A central table with drop leaves.

Nav station: A chart table is typically located to port, behind the companionway steps, with a quarter berth behind it.

Galley: Located to starboard, opposite the chart table, it includes a two-burner gimballed Plastimo gas cooker with an oven and grill, a sink with a manually pumped water supply, and storage.

Key features


Berths: 7 berths in two cabins (2 in forecabin, 3 in saloon, 1 quarter berth).

Headroom: Standing headroom is often noted as a positive feature.

Heating: Webasto 3 outlet heater serviced 2024.

Storage: Ample storage is provided through lockers, under-berth stowage, and shelves.


Inventory
Electronics

2x Bulkhead Compasses
Log Speed
Depth Sounder
Wind instrument
Chartplotter
VHF
Tiller autopilot x 2

Mooring and Anchoring

Bruce 10Kg anchor with 20m chain and 20 warp
CQR 12kg anchor with 30m chain and 20 warp
Electric Windlass
6 warps
4 fenders
Boathook

Safety

4 person valise liferaft serviced 2024
Lifering
Danbouy
Lifesling
4x Fire extinguishers (out of date)
Fire Blanket
Gas Detector
Horn
Navigation lights
2x Manual bilge pumps

General

Sprayhood
Dodgers
Dinghy
Boarding ladder
Radio

This 1983 Sigma 33 is listed for sale in Ardrossan, Scotland. With a 33ft layout, inboard engine setup and used condition, this boat is suited to buyers looking for sail options in this location. View full details, photos and specifications for reference RB671213 on Rightboat.